import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '@/components/Login'
import Home from '@/components/Home'



Vue.use(VueRouter)

const routes = [
  { path: '/', redirect: '/login' },
  { path: '/login', component: Login },
  { path: '/home', component: Home },
]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫
router.beforeEach((to, from, next) => {
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行， next()放行  next('/login')强制跳转

  if (to.path === '/login') return next()

  const tokenStr = window.sessionStorage.getItem('token')

  //没有token，强制跳转到登录
  if (!tokenStr) return next('/login')

  //放行
  next();
})

export default router
